Jeong, Hakyeong, Myungin Hwang, and Hojun Yeom. “Electrical and Protrusion Stimulation System for Braille Recognition Training”. International Journal of Engineering & Technology 7, no. 3.33 (August 29, 2018): 109–111. Accessed December 21, 2024. https://sciencepubco.com/index.php/ijet/article/view/18586.